Electromechanical driving device for use in a tailgate of a motor vehicle

• US 8,261,628 B2
• Filed: 10/01/2007
• Issued: 09/11/2012
• Est. Priority Date: 11/21/2006
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Moecklin, Stefan, Huesges, Mario, Metz, Ulrich
• Primary Examiner(s): Krause, Justin
• Assistant Examiner(s): VAEREWYCK, MATTHEW RYAN
• Application Number:
  US12/374,689
• Publication Number:
  US 20100132491A1
• Time in Patent Office: 1,807 Days
• Field of Search: 744/25, 744/34, 744/35, 74/891.4, 296/50, 296/57.1, 296/56, 296/96.15, 296/106, 152/503, 152/503.1, 152/501.6
• US Class Current: 74/435
• CPC Class Codes: B60S 1/0416 including other vehicle fittings
• CPC Class Codes: B60S 1/166 characterised by the combination of a motor-reduction unit and a mechanism for converting rotary into oscillatory movement
• CPC Class Codes: B60S 1/583 including wiping devices
• CPC Class Codes: E05B 81/13 a single actuator for driving a lock and additional vehicle components, e.g. window wipers or window lifters
• CPC Class Codes: Y10T 74/18792 including worm
• CPC Class Codes: Y10T 74/188 including spur gear
• CPC Class Codes: Y10T 74/19828 Worm
• CPC Class Codes: Y10T 74/19874 Mutilated

Abstract

An electromechanical driving device (1) for use in a tailgate of a motor vehicle, with an electric motor (2) for the rotary drive of a spur gear (4) which is accommodated in a gear housing (3) and is operatively connected to a gear arrangement (5) in order to drive an output shaft (19) for a window wiper mechanism, wherein the spur gear (4) is accommodated rotatably in the gear housing (3) by means of a co-rotating spur gear shaft (6), wherein a shaft section (7) of the spur gear shaft (6) extends out of the gear housing (3) on which means for actuating a closing mechanism (8) for closing the tailgate and/or a tailgate window are accommodated. An electromechanical driving device (1) for use in a tailgate of a motor vehicle is therefore provided, said driving device, which is used to selectively actuate a wiper mechanism or a closing mechanism, having a simple design and comprising a gear housing which is designed in accordance with a known construction for driving a wiper mechanism.

Claims

1. An electromechanical driving device (1) for use in a tailgate of a motor vehicle, having an electric motor (2) for driving in rotation a spur gear (4) which is accommodated in a transmission housing (3) and which is operatively connected to a transmission arrangement (5) in order to drive an output shaft (19) for a windshield wiping device, wherein the spur gear (4) is rotatably accommodated in the transmission housing (3) by means of a co-rotating spur gear shaft (6), characterized in that a shaft section (7) of the spur gear shaft (6) extends out of the transmission housing (3) and means for actuating a closing device (8) for closing the tailgate and/or a tailgate windshield are accommodated on the shaft section (7), characterized in that the means for actuating the closing device (8) comprises a freewheeling device which causes the closing device (8) to be actuated when the spur gear shaft (6) rotates in a first rotational direction, and causes freewheeling of the spur gear shaft (6) in an opposite second rotational direction, characterized in that the freewheeling device has an actuating lever (9) which is accommodated in a co-rotating fashion on the shaft section (7) of the spur gear shaft (6) and is operatively connected to a closing device lever (10) having a wedge shape in the opposite second rotational direction of the actuating lever (9).

2. The electromechanical driving device (1) as claimed in claim 1, characterized in that the actuating lever (9) is of elastically sprung design in the direction of extent of the spur gear shaft (6), such that said actuating lever (9) runs up against the wedge-shaped closing device lever (10) in a positively locking fashion in order to actuate the closing device (8) in the first rotational direction, and, in the second rotational direction, said actuating lever (9) slides in a sprung fashion over the wedge-shaped closing device lever (10) in order to bring about freewheeling of the spur gear shaft (6).

3. The electromechanical driving device (1) as claimed in claim 1, characterized in that a second freewheeling device is arranged between the spur gear (4) and the transmission arrangement (5), which second freewheeling device interrupts transmission of movement to the transmission arrangement (5) when the spur gear (4) rotates in the first rotational direction, and, in the opposite second rotational direction, the second freewheeling device causes the movement to be transmitted.

4. The electromechanical driving device (1) as claimed in claim 3, characterized in that the second freewheeling device comprises a guide groove (13) which is provided in a planar fashion in the spur gear (4) and has a ramp-shaped raised portion (14) in the guide groove (13), wherein a spring-loaded bolt (15), which is connected to the transmission arrangement (5), is guided in the guide groove (13).

5. The electromechanical driving device (1) as claimed in claim 4, characterized in that the ramp-shaped raised portion (14) is bounded by a run-up side and by a stop side, and, during a rotation of the spur gear (4) the bolt (15) slides over the run-up side in the first rotational direction, and, in the case of a rotation in the opposite second rotational direction, the bolt (15) runs up against the stop side in a positively locking fashion, such that movement is transmitted to the transmission arrangement.

6. The electromechanical driving device (1) as claimed in claim 3, characterized in that the second freewheeling device comprises a guide groove (13) which is provided in a planar fashion in the spur gear (4) and which has a ramp-shaped raised portion (14) bounded by a run-up side and by a stop side, and, during a rotation of the spur gear (4), a bolt (15) slides over the run-up side in the first rotational direction, and, in the case of a rotation in the opposite second rotational direction, the bolt (15) runs up against the stop side in a positively locking fashion, such that movement is transmitted to the transmission arrangement.

7. The electromechanical driving device (1) as claimed in claim 3, characterized in that a guide groove (13) which is provided in a planar fashion in the spur gear (4) includes a locking spring (16), wherein, when the spur gear (4) rotates in the first rotational direction, the bolt (15) which is guided in the guide groove (13) slides over the locking spring (16), and, in the case of rotation in the opposite second rotational direction, the bolt (15) runs up in a positively locking fashion against the locking spring (16), such that movement is transmitted to the transmission arrangement.

8. The electromechanical driving device (1) as claimed in claim 1, characterized in that the closing device (8) is arranged on the transmission housing (3).

9. The electromechanical driving device (1) as claimed in claim 8, characterized in that the closing device (8) is arranged on the transmission housing (3) on a side where the shaft section (7) passes out of the transmission housing (3).

10. An electromechanical driving device (1) for use in a tailgate of a motor vehicle, having an electric motor (2) for driving in rotation a spur gear (4) which is accommodated in a transmission housing (3) and which is operatively connected to a transmission arrangement (5) in order to drive an output shaft (19) for a windshield wiping device, wherein the spur gear (4) is rotatably accommodated in the transmission housing (3) by means of a co-rotating spur gear shaft (6), characterized in that a shaft section (7) of the spur gear shaft (6) extends out of the transmission housing (3) and means for actuating a closing device (8) for closing the tailgate and/or a tailgate windshield are accommodated on the shaft section (7), characterized in that the means for actuating the closing device (8) comprises a freewheeling device which causes the closing device (8) to be actuated when the spur gear shaft (6) rotates in a first rotational direction, and causes freewheeling of the spur gear shaft (6) in an opposite second rotational direction, characterized in that the freewheeling device includes a sleeve freewheel (11) which is arranged on the shaft section (7) of the spur gear shaft (6) and on which an actuating lever (9) is accommodated and is operatively connected to a closing device lever (10).

11. The electromechanical driving device (1) as claimed in claim 10, characterized in that a spring element (12) is arranged between the actuating lever (9) and the transmission housing (3) in order to prevent undesired rotating back of the actuating lever (9) in the opposite second rotational direction.

12. The electromechanical driving device (1) as claimed in claim 10, characterized in that a second freewheeling device is arranged between the spur gear (4) and the transmission arrangement (5), which second freewheeling device interrupts transmission of movement to the transmission arrangement (5) when the spur gear (4) rotates in the first rotational direction, and, in the opposite second rotational direction, the second freewheeling device causes the movement to be transmitted.

13. The electromechanical driving device (1) as claimed in claim 12, characterized in that the second freewheeling device comprises a guide groove (13) which is provided in a planar fashion in the spur gear (4) and has a ramp-shaped raised portion (14) in the guide groove (13), wherein a spring-loaded bolt (15), which is connected to the transmission arrangement (5), is guided in the guide groove (13).

14. The electromechanical driving device (1) as claimed in claim 12, characterized in that the second freewheeling device comprises a guide groove (13) which is provided in a planar fashion in the spur gear (4) and which has a ramp-shaped raised portion (14) bounded by a run-up side and by a stop side, and, during a rotation of the spur gear (4), a bolt (15) slides over the run-up side in the first rotational direction, and, in the case of a rotation in the opposite second rotational direction, the bolt (15) runs up against the stop side in a positively locking fashion, such that movement is transmitted to the transmission arrangement.

15. The electromechanical driving device (1) as claimed in claim 12, characterized in that a guide groove (13) which is provided in a planar fashion in the spur gear (4) includes a locking spring (16), wherein, when the spur gear (4) rotates in the first rotational direction, the bolt (15) which is guided in the guide groove (13) slides over the locking spring (16), and, in the case of rotation in the opposite second rotational direction, the bolt (15) runs up in a positively locking fashion against the locking spring (16), such that movement is transmitted to the transmission arrangement.

16. An electromechanical driving device (1) for use in a tailgate of a motor vehicle, having an electric motor (2) for driving in rotation a spur gear (4) which is accommodated in a transmission housing (3) and which is operatively connected to a transmission arrangement (5) in order to drive an output shaft (19) for a windshield wiping device, wherein the spur gear (4) is rotatably accommodated in the transmission housing (3) by means of a co-rotating spur gear shaft (6), characterized in that a shaft section (7) of the spur gear shaft (6) extends out of the transmission housing (3) and means for actuating a closing device (8) for closing the tailgate and/or a tailgate windshield are accommodated on the shaft section (7), characterized in that a freewheeling device is arranged between the spur gear (4) and the transmission arrangement (5), which freewheeling device interrupts transmission of movement to the transmission arrangement (5) when the spur gear (4) rotates in a first rotational direction, and, in an opposite second rotational direction, the freewheeling device causes the movement to be transmitted, characterized in that the freewheeling device a sleeve freewheel (17) which is arranged on the spur gear shaft (6) and on which a transmission lever (18), which is operatively connected to the transmission arrangement (5), is arranged.

17. The electromechanical driving device (1) as claimed in claim 16, characterized in that the means for actuating the closing device (8) comprises another freewheeling device which causes the closing device (8) to be actuated when the spur gear shaft (6) rotates in a first rotational direction, and causes freewheeling of the spur gear shaft (6) in an opposite second rotational direction.

18. The electromechanical driving device (1) as claimed in claim 17, characterized in that the other freewheeling device has an actuating lever (9) which is accommodated in a co-rotating fashion on the shaft section (7) of the spur gear shaft (6) and is operatively connected to a closing device lever (10) having a wedge shape in the opposite second rotational direction of the actuating lever (9).

19. The electromechanical driving device (1) as claimed in claim 18, characterized in that the actuating lever (9) is of elastically sprung design in the direction of extent of the spur gear shaft (6), such that said actuating lever (9) runs up against the wedge-shaped closing device lever (10) in a positively locking fashion in order to actuate the closing device (8) in the first rotational direction, and, in the second rotational direction, said actuating lever (9) slides in a sprung fashion over the wedge-shaped closing device lever (10) in order to bring about free-wheeling of the spur gear shaft (6).

20. The electromechanical driving device (1) as claimed in claim 17, characterized in that the other freewheeling device includes a sleeve freewheel (11) which is arranged on the shaft section (7) of the spur gear shaft (6) and on which the actuating lever (9) is accommodated and is operatively connected to a closing device lever (10).

21. The electromechanical driving device (1) as claimed in claim 20, characterized in that a spring element (12) is arranged between the actuating lever (9) and the transmission housing (3) in order to prevent undesired rotating back of the actuating lever (9) in the opposite second rotational direction.